packages/contracts/migrations/5_transfer_ownership.ts


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import {Artifacts} from '../util/artifacts';
import {ContractInstance} from '../util/types';
const {
    TokenTransferProxy,
    MultiSigWalletWithTimeLock,
    TokenRegistry,
} = new Artifacts(artifacts);

let tokenRegistry: ContractInstance;
module.exports = (deployer: any, network: string) => {
    if (network !== 'development') {
        deployer.then(async () => {
            return Promise.all([
                TokenTransferProxy.deployed(),
                TokenRegistry.deployed(),
            ]).then((instances: ContractInstance[]) => {
                let tokenTransferProxy: ContractInstance;
                [tokenTransferProxy, tokenRegistry] = instances;
                return tokenTransferProxy.transferOwnership(MultiSigWalletWithTimeLock.address);
            }).then(() => {
                return tokenRegistry.transferOwnership(MultiSigWalletWithTimeLock.address);
            });
        });
    }
};